US9920509B2 - Flexible conduit element - Google Patents

Flexible conduit element Download PDF

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Publication number
US9920509B2
US9920509B2 US14/888,254 US201314888254A US9920509B2 US 9920509 B2 US9920509 B2 US 9920509B2 US 201314888254 A US201314888254 A US 201314888254A US 9920509 B2 US9920509 B2 US 9920509B2
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Prior art keywords
connecting portion
flexible conduit
corrugated portions
conduit according
partially
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Active
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US14/888,254
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English (en)
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US20170152656A9 (en
US20160069059A1 (en
Inventor
Uwe Webel
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SJM Co Ltd
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SJM Co Ltd
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Assigned to SJM CO. LTD. reassignment SJM CO. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEBEL, Uwe
Publication of US20170152656A9 publication Critical patent/US20170152656A9/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D11/00—Other component parts of water-closets, e.g. noise-reducing means in the flushing system, flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe
    • E03D11/02—Water-closet bowls ; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/28—Odour seals
    • E03C1/284—Odour seals having U-shaped trap
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D11/00—Other component parts of water-closets, e.g. noise-reducing means in the flushing system, flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe
    • E03D11/18—Siphons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/08—Adjustable joints; Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/10—Adjustable joints; Joints allowing movement comprising a flexible connection only
    • F16L27/1004—Adjustable joints; Joints allowing movement comprising a flexible connection only introduced in exhaust pipes for hot gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/10—Adjustable joints; Joints allowing movement comprising a flexible connection only
    • F16L27/107—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • F16L27/111—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations the bellows being reinforced
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L43/00—Bends; Siphons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube
    • F16L51/025—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube with several corrugations
    • F16L51/027—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube with several corrugations with external reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines
    • F16L51/02—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube
    • F16L51/03—Expansion-compensation arrangements for pipe-lines making use of a bellows or an expansible folded or corrugated tube comprising two or more bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0337—Noise absorbers by means of a flexible connection

Definitions

  • the present invention relates to a flexible conduit means for an exhaust system of a combustion engine vehicle.
  • the flexible conduit means comprises a bellows member in the shape of a hollow cylinder, an outer flexible member that encloses the bellows member at least partially, at least a resilient member that is elastically deformable and encloses the flexible member at least partially and abuts against it, whereas the bellows member comprises at least two corrugated portions that are annularly corrugated in the axial direction of the bellows member, at least the connecting portion that is formed axially between the corrugated portions of the bellows member, and the resilient member encloses the connecting portion at least partially.
  • Such a flexible conduit means is known from EP 2 441 996.
  • the flexible conduit means are commonly used in the machining industry. They are placed in the presence of a combustion engine within the exhaust system between the exhaust pipe leading from the engine and the muffler.
  • the flexible conduit means serves as a decoupler between the exhaust system and the machinery.
  • the flexible conduit means is exposed to heat and vibration and humidity as well as impact loads which are caused by operation of the engine, the machinery and the movement of the engine itself when the engine is started or during acceleration or braking or gear shifting. In case of the application in a vehicle, the flexible conduit means is also exposed to vibrations and environmental conditions.
  • the known flexible conduit means shows a metal bellows with annular corrugated shape.
  • a metal bellows member In the middle of the metal bellows member, there is provided a circular-shaped cylindrical surface.
  • the metal bellows member is covered by a flexible outer mesh over the complete length and fixed to the middle cylindrical portion by a spring clamp.
  • the flexible mesh is also fixed to the metal bellows member at the outer ends of the metal bellows member. Due to the vibration of the built-in exhaust gas system, the metal bellows member is exposed to vibration and thus starts to move and create noise.
  • the outer flexible mesh covers the metal bellows member and creates friction between the mesh and the metal bellows member.
  • It is an object of the present invention is to further improve the known flexible conduit means and its vibration behaviour for dampening and to enable a flexible conduit means to be provided for a wide range of applications and built-in situations and thereby reducing manufacturing costs.
  • a flexible conduit means for an exhaust system of a combustion engine vehicle of the aforementioned kind comprising a bellows member extending in an axial direction, an outer flexible braided or knitted member that encloses the bellows member at least partially, at least a resilient member, that is elastically deformable and encloses the outer braided or knitted member at least partially and abuts against it, whereas the bellows member comprises at least two corrugated portions that are annularly corrugated in the axial direction of the bellows member by alternating ridges and recesses along the outer periphery of the corrugated portions at substantially regular intervals, at least a connecting portion that is formed axially between the corrugated portions of the bellows member, and the resilient member encloses the connecting portion at least partially, and the connecting portion comprises flanks that are formed at its axial ends, and which extend at least in a radial direction, and the connecting portion in between comprising a curved and/
  • Such a connecting portion with a curved shape leads to a curved outer surface of the connecting portion and thereby is easy to manufacture and has good vibration absorbing properties and allows for flexibility adjustment in comparison to a cylindrical shaped connecting portion. Due to the shape and the length of the connecting portion in relation to the corrugated portions which are adjacent to the connecting portion, the vibration behaviour of the bellows member can be improved.
  • the largest outer diameter of the connecting portion is smaller than the outer diameter of the adjacent corrugated portions.
  • the curved and/or arched portion is shaped in concave and/or convex form.
  • the vibration behaviour can be further improved. Due to the shape the warping moment can be adjusted positively for the load condition.
  • a curved surface and a curved hollow body have a higher warping moment than a cylindrical shape so that the vibration response of the flexible conduit means is positively influenced as the movement and excitation of the connecting portion is further increased.
  • the curved and/or arched portion comprises a plurality of curves or bends which consist preferable of different radii.
  • different shapes and/or arched portion can be realized in the metal bellows member. Due to the different radii, the flexible conduit means can be adjusted for different applications advantageously and the available design space can be used at the optimum. By using different radii with multiple curves the flexible conduit means can be adjusted accurately to the intended vibration behaviour and response under load as curved surfaces provide generally a higher warping moment and thus a higher bending stiffness which affects the vibration behaviour.
  • the connecting portion is curved and/or arched at least partially towards the outside and towards the inside of the metal bellows member.
  • the metal bellows member does not necessarily need to have a concave and/or convex shape only but can have a irregular or symmetrical shape. Due to the shape the outer flexible member can be tightened around the bellows member so that it is adjustable. Also in case the flexible conduit means is axially compressed, for example due to a smaller than intended built in space, the outer flexible member may only have a line contact due to the geometry of the connecting portion which is positive for vibration behaviour.
  • the profile of the resilient member extends at least partially along the axial direction of the bellows member.
  • the resilient member has a curved profile which substantially at least resembles the axial shape of the connecting portion.
  • the resilient member is enabled to follow the outer shape of the bellows member and thereby the resilient member is able to follow the shape of the connecting portion very closely so as to reduce the movement due to vibration.
  • the resilient member has substantially along its surface the same distance to the bellows members surface so that the outer flexible member is tightened and the resilient member does not touch the bellows member so that in case of vibration contact is prevented. This can also improve the usage of the provided design space as the resilient member moves closer to the connecting portion and thus the necessary diameter and circumference is reduced.
  • the recited member presses the outer flexible braided or knitted member against the connecting portion.
  • the outer flexible member is thus not only held in place by the tension from the resilient member but additionally by the friction between the resilient member and the connecting portion.
  • This can be used to have a high friction force and to hold the outer flexible member in place but at the same time to reduce the tension in the rest of the outer flexible member. This will reduce the friction between the outer flexible member and the bellows member in the other portions of the flexible conduit means except the connecting portion.
  • the tension in the outer flexible member can be adjusted specifically and locally and still the axial movement can be avoided.
  • the contact between the outer flexible braided or knitted member and the connecting portion is substantially a line contact along the outer surface circumference of the connecting portion. Due to the line contact, a very high surface pressure between the outer flexible member and the connecting portion is realized as the contact area is small compared to a surface contact. Thus a high resistance against axial movement of the outer flexible member is further ensured. Additionally the elastic force of the resilient member in regard of material strength can be reduced as the line contact provides a high pressure which allows reduced spring forces of the resilient member.
  • the contact between the outer flexible braided or knitted member and the connecting portion is a surface contact which extends substantially along the axial direction of the bellows member and along the outer surface circumference of the connecting portion.
  • the contact between the outer flexible member and the connecting portion can be improved by increasing the surface area and thus increasing the friction area between the outer flexible member and the connecting portion. Especially due to the arced or curved shape of the contact area the friction is increased in comparison to a plain cylindrical shape. Due to the curved surface contact the axial movement of the outer flexible member is prevented even if the spring force and thus the tension of the resilient member decreases over lifetime or due to corrosion or general aging of the material.
  • each of the flanks are connected in the axial direction to the next portion by an at least partially cylindrical portion.
  • a special area for the tooling can be provided along the bellows member and the flanks can be manufactured with reduced costs.
  • the periodically repetition of the corrugated portions is discontinued and thus the vibration behaviour is improved as the cylindrical portion has a higher warping moment that the corrugated portions which improves the stiffness.
  • the axial length between the corrugated portions which enclose a connecting portion is at least two times to seven times longer, preferably three times to six times longer, than the regular intervals of the corrugated portions. Due to the length of the connecting portion, the warping moment and the stiffness are adjusted. It has been found that the relation between the length of the regular intervals of the corrugated portion and the length of the connecting portion can be used to prevent resonance behaviour of the flexible conduit means.
  • the connecting portion being in the range of two to seven times the length of the regular intervals the warping moment and the stiffness increase positively dampen noise, vibration, harshness (NVH).
  • the axial length between the flanks of the connecting portion is at least 30 percent to 80 percent of the axial length between the adjacent corrugated portions which are connected to the cylindrical portion, preferably 40 to 70 percent.
  • the relation between the axial distance of the corrugated portions and the connecting portion can be further positively adjusted so that the vibration behaviour of the connecting portion does prevent a resonance of the flexible conduit means.
  • the cylindrical portions are thus shorter in the axial direction than the curved and/or arched portion of the connecting portion and the effective diameter of the connecting portion is increased which also increases the warping moment.
  • the largest outer diameter of the connecting portion is larger than the average diameter of at least one of the adjacent corrugated portions.
  • the average diameter resembles the relation between the largest and smallest diameter of the corrugated portions.
  • a large diameter of the connecting portion further helps to improve the vibration behaviour as the bending point is further moved outwards so that the excitation of the connecting portion is further increased and the stiffness of the connecting portion is further improved.
  • the smallest diameter of the connecting portion is larger than the smallest inner diameter of at least one of the adjacent corrugated portions. With the smallest diameter being on a further outward area of the connecting portion, the stiffness of the connecting portion is further improved and the bending and vibration resistance of the connecting portion is increased as the effective diameter of the connecting portion is enlarged and thus the warping moment is further increased.
  • FIGS. 1, 2 and 3 The present invention will further be described by the following FIGS. 1, 2 and 3 :
  • FIG. 1 shows a partial cut-out cross-section of the first embodiment.
  • FIG. 2 shows a second embodiment of the present invention.
  • FIG. 3 shows an overview of the flexible conduit metal means of a third embodiment.
  • FIG. 1 an partial axial cut view of one embodiment of the flexible conduit means 1 is shown.
  • the flexible conduit means 1 comprises an inner bellows member 2 in the center, the adjacent outer flexible member 3 , and on the outside a resilient member 4 .
  • the shown bellows member 2 comprises a corrugated portion 21 on its axial left and right side, and the connecting portion 24 axially between them.
  • the bellows member 2 is fixedly connected to the outer flexible member on its axial outer ends with collar members 11 as shown in FIG. 3 .
  • the bellows member 2 is comprising the corrugated portions 21 which have ridges and recesses 23 which are made by bending of the bellows member 2 towards the axial outside and the inside along the axial length of the bellows member 2 .
  • the corrugated portions 21 have annular rings along its axial surface which have an inner and an outer diameter and are repeated by regular intervals 28 .
  • the connecting portion 24 Axially between the corrugated portions 21 is the connecting portion 24 .
  • the connecting portion 24 and the adjacent corrugated portions 21 each enclose a cylindrical portion 27 between them.
  • the cylindrical portion 27 has on each side a radius which is connected to the corrugated portion 21 and the connecting portion 24 .
  • the connecting portion 24 which comprises of flanks 25 which are oriented radially and are connected by a curved or arched portion 26 .
  • the flanks may also have only a partial radial direction.
  • the flanks 25 the length of the connecting portion 24 is defined.
  • the connecting portion should just show a half circle shape or an elliptic shape still the flanks are necessary to connect the connecting portion 24 with the bellows member 2 .
  • the connecting portion 24 is defined by the first and last flank 25 which further becomes the connecting portion 24 .
  • the arched or curved portion of the connecting portion 24 may have any shape which have radii or continuously curved surface shapes. By rounded curves or arc shapes the vibration behaviour is positively influenced in that the warping moment of the connecting portion is increased. Together with the increase a wobbling movement or vibration is reduced and thus the transfer of vibration to the adjacent parts is lessened. Further the generation of noise from the flexible conduit means itself is reduced.
  • the curves or arcs can have any shape and may be designed as a continuous rounded surface so that sharp bends or buckles are omitted.
  • the arched or curved portion 26 spans the complete axial distance between the two flanks 25 .
  • the largest outer diameter 29 of the connecting portion 24 is smaller than the largest outer diameter of the corrugated portions 21 .
  • Radially further outside of the metal bellows member 2 is the outer flexible member 3 which spans over both corrugated portions 21 , the bellows member 2 and the connecting portion 24 .
  • the outer flexible member 3 is held in place against movement by the resilient member 4 which contacts the outer flexible member 3 in the area of the connection portion 24 .
  • the outer diameter of the resilient member 4 is at least the same size as the outer diameter of the outer flexible member 3 so that the outer shape of the flexible conduit means 1 is not extended beyond the outer diameter of the outer flexible member 3 .
  • the resilient member has a contact surface to the outer flexible member 3 shaped parallel to the axial direction of the flexible conduit means 1 so that it has substantially a cylindrical shape.
  • the resilient member 4 holds the outer flexible member 3 by an radial elastic force towards the axis of the flexible conduit means thereby providing tension on the outer flexible member 3 so that the outer flexible member 3 has a movable contact to the corrugated portions 21 and friction force between the outer flexible member 3 and the corrugated portions 21 is ensured.
  • the resilient member 4 and the outer flexible member 3 do not contact the connecting portion 24 so that the resilient member 4 has free radial play to apply the elastic force on the outer flexible member 3 and it can be ensured that the resilient member 4 can apply the complete amount of force without being blocked by the connecting portion 24 which allows an accurate adjustment of the resilient member 4 and the outer flexible member 3 to the environment and the vibration conditions.
  • This also ensures that the tensions applied to the outer flexible member 3 is acting on the complete length of the outer flexible member 3 as the complete axial length is pulled by the resilient member 4 .
  • the outer flexible member is held on its ends by the collar members 11 so that the tension to the outer flexible member is distributed evenly over the surface.
  • FIG. 2 shows another embodiment of the current invention.
  • the construction is basically the same as shown in FIG. 1 .
  • Yet the embodiment of FIG. 2 shows a different setup of the connecting portion 24 and of the usage of the outer flexible member 3 .
  • the connecting portion 24 also is defined by the flanks 25 . Yet between the flanks 25 is a concave curved portion 26 which is also curved towards the inside of the bellows member 2 .
  • the embodiment according to FIG. 2 is different to the embodiment of FIG. 1 in that the connecting portion 24 is also curved towards the inside of the bellows member 2 and is therefore similar to the surface of the connecting portion 24 .
  • the resilient member 4 contacts the outer flexible member 3 and presses the outer flexible member 3 on the connecting portion 24 and its curved inward portion 26 and a surface contact is provided. Due to the bent shape of the connecting portion 24 and the similar bent shape of the resilient member 4 , the area of the contact surface of the outer flexible member 3 and the connecting portion 24 is further increased in comparison to a plain cylindrical-shaped area and increases the friction of the outer flexible member 3 and the connecting portion 24 so that the surface pressure of the resilient member 4 is further supported by a higher friction area between the flexible member and the connecting portion 24 .
  • the design of the connecting portion 24 in FIG. 2 brings the resilient member 4 in contact with the connecting portion 24 . Therefore the tension applied to the outer flexible member 3 can be accurately adjusted as the contact of the resilient member 4 limits the tension which is applied on the outer flexible member 3 .
  • FIG. 3 shows a flexible conduit means 1 according to another embodiment.
  • the shown flexible conduit means 1 consists of a bellows member 2 which has on its outside the outer flexible member 3 .
  • the outer flexible member 3 is fixed to the bellows member 2 on its axial ends with collar rings 11 which are fixed by clamping or welding.
  • the bellows member 2 comprises annular corrugations 21 along its axial length which increases the flexibility of the bellows member 2 to vibration or movement.
  • the bellows member 2 contacts the outer flexible member 3 so that friction between the outer flexible member 3 and the bellows member 2 is ensured. Due to this friction, the noise and vibration behaviour of the flexible conduit means 1 is dampened and thus the generation of sound or vibration is reduced.
  • FIG. 3 shows that the outer flexible member 3 has actually a braided or knitted structure, preferably a knitted structure.
  • the outer flexible member 3 is fixed to the end portions of the flexible conduit means 1 by force so that an axial tension is applied to the outer flexible member 3 which pulls the outer flexible member 3 against the surface of the corrugated portions 21 of the bellows member 2 .
  • a resilient member 4 is provided which surrounds the bellows member 2 in axial area of a connecting portion 24 .
  • the resilient member 4 is consisting of wire which is in concave shape in the axial direction.
  • the resilient member 4 provides a radial force on the outer flexible member 3 so that the outer flexible member 3 is clamped and held between the resilient member 4 and the connecting portion 24 .
  • the outer flexible member 3 is contacting the connecting portion 24 which has a curved portion 26 in an mainly concave shape.
  • the friction force is further improved by the curved shape so that under vibration load of the flexible conduit means 1 the outer flexible member 3 is held in place against axial movement. Due to the shape not only the force of the resilient member 4 in the radial direction holds the outer flexible member 3 in place but also the resistance of the curvature radius of the contact area which increases the resistance of movement along the axial direction. It is also possible to have a connecting portion 24 in a multiple curved shape.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Joints Allowing Movement (AREA)
US14/888,254 2013-05-17 2013-05-17 Flexible conduit element Active US9920509B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI02U00086 2002-02-22
ITMI02U000086 2002-02-22
PCT/EP2013/001480 WO2014183773A1 (en) 2013-05-17 2013-05-17 Flexible conduit element

Publications (3)

Publication Number Publication Date
US20160069059A1 US20160069059A1 (en) 2016-03-10
US20170152656A9 US20170152656A9 (en) 2017-06-01
US9920509B2 true US9920509B2 (en) 2018-03-20

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US14/888,254 Active US9920509B2 (en) 2013-05-17 2013-05-17 Flexible conduit element

Country Status (6)

Country Link
US (1) US9920509B2 (ko)
EP (1) EP2997291B1 (ko)
JP (1) JP6326706B2 (ko)
KR (1) KR101862841B1 (ko)
CN (1) CN104471301B (ko)
WO (1) WO2014183773A1 (ko)

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KR101499218B1 (ko) * 2013-08-29 2015-03-05 현대자동차주식회사 저진동 특성을 가지는 자동차용 인터쿨러 파이프
DE102016103848A1 (de) * 2016-03-03 2017-09-07 Witzenmann Gmbh Flexibles Leitungsteil
CN106014582B (zh) 2016-06-15 2019-01-15 宁波菲力克汽配有限公司 一种减震柔性管
CN106195470A (zh) * 2016-08-29 2016-12-07 长沙成进汽车配件有限公司 一种汽车柔性管件及其制造方法
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CN104471301B (zh) 2018-10-02
JP2016522875A (ja) 2016-08-04
KR20160018561A (ko) 2016-02-17
WO2014183773A1 (en) 2014-11-20
US20160069059A1 (en) 2016-03-10
CN104471301A (zh) 2015-03-25
KR101862841B1 (ko) 2018-05-30
EP2997291B1 (en) 2020-10-07

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